Publications
163 results found
Romain C, Thevenon A, Saini PK, et al., 2016, Dinuclear Metal Complex-Mediated Formation of CO2-Based Polycarbonates, CARBON DIOXIDE AND ORGANOMETALLICS, Editors: Lu, Publisher: SPRINGER-VERLAG BERLIN, Pages: 101-141, ISBN: 978-3-319-22077-2
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- Citations: 3
, 2016, Inside Cover: Dizinc Lactide Polymerization Catalysts: Hyperactivity by Control of Ligand Conformation and Metallic Cooperativity (Angew. Chem. Int. Ed. 30/2016), Angewandte Chemie - International Edition, Vol: 55, ISSN: 1433-7851
Garcia-Trenco A, White ER, Shaffer MSP, et al., 2016, A one-step Cu/ZnO quasi-homogeneous catalyst for DME production from syn-gas, CATALYSIS SCIENCE & TECHNOLOGY, Vol: 6, Pages: 4389-4397, ISSN: 2044-4753
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- Citations: 7
Myers D, Cyriac A, Williams CK, 2016, Polymer synthesis: To react the impossible ring., Nat Chem, Vol: 8, Pages: 3-4
Thevenon A, Garden JA, White AJP, et al., 2015, Dinuclear Zinc Salen Catalysts for the Ring Opening Copolymerization of Epoxides and Carbon Dioxide or Anhydrides, INORGANIC CHEMISTRY, Vol: 54, Pages: 11906-11915, ISSN: 0020-1669
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- Citations: 29
Romain C, Bennington MS, White AJP, et al., 2015, Macrocyclic Dizinc(II) Alkyl and Alkoxide Complexes: Reversible CO2 Uptake and Polymerization Catalysis Testing, INORGANIC CHEMISTRY, Vol: 54, Pages: 11842-11851, ISSN: 0020-1669
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- Citations: 17
Garden JA, Saini PK, Williams CK, 2015, Greater than the Sum of Its Parts: A Heterodinuclear Polymerization Catalyst, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, Vol: 137, Pages: 15078-15081, ISSN: 0002-7863
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- Citations: 50
Zhu Y, Romain C, Williams CK, 2015, Selective Polymerization Catalysis: Controlling the Metal Chain End Group to Prepare Block Copolyesters, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, Vol: 137, Pages: 12179-12182, ISSN: 0002-7863
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- Citations: 49
Paul S, Romain C, Shaw J, et al., 2015, Sequence Selective Polymerization Catalysis: A New Route to ABA Block Copoly(ester-b-carbonate-b-ester), MACROMOLECULES, Vol: 48, Pages: 6047-6056, ISSN: 0024-9297
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- Citations: 42
Zhu Y, Romain C, Williams C, 2015, Chemoselective polymerization: From multicomponent feedstocks to sequence controlled block copolyesters, Publisher: AMER CHEMICAL SOC, ISSN: 0065-7727
Zhu Y, Williams CK, 2015, Biodegradable thermoplastic elastomer from multi-block copolyester
Brown NJ, Garcia-Trenco A, Weiner J, et al., 2015, From Organometallic Zinc and Copper Complexes to Highly Active Colloidal Catalysts for the Conversion of CO2 to Methanol, ACS CATALYSIS, Vol: 5, Pages: 2895-2902, ISSN: 2155-5435
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- Citations: 23
Zhu Y, Romain C, Poirier V, et al., 2015, Influences of a Dizinc Catalyst and Bifunctional Chain Transfer Agents on the Polymer Architecture in the Ring-Opening Polymerization of epsilon-Caprolactone, Macromolecules, Vol: 48, Pages: 2407-2416, ISSN: 0024-9297
The polymerization of ε-caprolactone is reported using various bifunctional chain transfer agents and a dizinc catalyst. Conventionally, it is assumed that using a bifunctional chain transfer agent (CTA), polymerization will be initiated from both functional groups; however, in this study this assumption is not always substantiated. The different architectures and microstructures of poly(ε-caprolactone) samples (PCL) are compared using a series of bifunctional and monofunctional alcohols as the chain transfer agents, including trans-1,2-cyclohexanediol (CHD), ethylene glycol (EG), 1,2-propanediol (PD), poly(ethylene glycol) (PEG), 2-methyl-1,3-propanediol (MPD), 1-hexanol, 2-hexanol, and 2-methyl-2-pentanol. A mixture of two architectures is observed when diols containing secondary hydroxyls are used, such as cyclohexanediol or propanediol; there are chains that are both chain-extended and chain-terminated by the diol. These findings indicate that not all secondary hydroxyl groups initiate polymerization. In contrast, chain transfer agents containing only primary hydroxyl groups in environments without steric hindrance afford polymer chains of a single chain extended architecture, whereby polymer chains are initiated from both hydroxyl groups on the diol. Kinetic analyses of the polymerizations indicate that the propagation rate constant (kp) is significantly higher than the initiation rate constant (ki): kp/ki > 5. A kinetic study conducted using a series of monofunctional chain transfer agents shows that the initiation rate, ki, is dependent on the nature of the hydroxyl group, with the rates decreasing in the order ki(primary) > ki(secondary) > ki(tertiary). It is proposed that two polymer architectures are present as a consequence of slow rates of initiation from the secondary hydroxyl groups, on the diol, compared to propagation which occurs from a primary hydroxyl group. In addition to the reactivity differences of the alcohols, steric
Bakewell C, Fateh-Iravani G, Beh D, et al., 2015, Comparing a series of 8-quinolinolato complexes of aluminium, titanium and zinc as initiators for the ring-opening polymerization of rac-lactide., Dalton Transactions, Vol: 44, ISSN: 1477-9226
The preparation and characterization of a series of 8-hydroxyquinoline ligands and their complexes with Ti(iv), Al(iii) and Zn(ii) centres is presented. The complexes are characterized using NMR spectroscopy, elemental analysis and, in some cases, by single crystal X-ray diffraction experiments. The complexes are compared as initiators for the ring-opening polymerization of racemic-lactide; all the complexes show moderate/good rates and high levels of polymerization control. In the case of the titanium or aluminium complexes, moderate iso-selectivity is observed (Pi = 0.75), whereas in the case of the zinc complexes, moderate hetero-selectivity is observed (Ps = 0.70).
Noimark S, Weiner J, Noor N, et al., 2015, Dual-Mechanism Antimicrobial Polymer-ZnO Nanoparticle and Crystal Violet-Encapsulated Silicone, ADVANCED FUNCTIONAL MATERIALS, Vol: 25, Pages: 1367-1373, ISSN: 1616-301X
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- Citations: 52
Bakewell C, White AJP, Long NJ, et al., 2015, Scandium and Yttrium Phosphasalen Complexes as Initiators for Ring-Opening Polymerization of Cyclic Esters, Inorganic Chemistry, Vol: 54, Pages: 2204-2212, ISSN: 1520-510X
Chapman AM, Keyworth C, Kember MR, et al., 2015, Adding Value to Power Station Captured CO2: Tolerant Zn and Mg Homogeneous Catalysts for Polycarbonate Polyol Production, ACS Catalysis, Vol: 5, Pages: 1581-1588, ISSN: 2155-5435
Paul S, Zhu Y, Romain C, et al., 2015, Ring-opening copolymerization (ROCOP): synthesis and properties of polyesters and polycarbonates, CHEMICAL COMMUNICATIONS, Vol: 51, Pages: 6459-6479, ISSN: 1359-7345
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- Citations: 156
Giarola S, Romain C, Williams CK, et al., 2015, Production of phthalic anhydride from biorenewables: process design, 12TH INTERNATIONAL SYMPOSIUM ON PROCESS SYSTEMS ENGINEERING AND 25TH EUROPEAN SYMPOSIUM ON COMPUTER AIDED PROCESS ENGINEERING, PT C, Vol: 37, Pages: 2561-2566, ISSN: 1570-7946
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- Citations: 1
Buchard A, North M, Kozak C, et al., 2015, Atom efficiency in small molecule and macromolecule synthesis: general discussion, FARADAY DISCUSSIONS, Vol: 183, Pages: 97-123, ISSN: 1359-6640
Winkler M, Romain C, Meier MAR, et al., 2015, Renewable polycarbonates and polyesters from 1,4-cyclohexadiene, GREEN CHEMISTRY, Vol: 17, Pages: 300-306, ISSN: 1463-9262
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- Citations: 80
Romain C, Williams CK, 2015, Combining Sustainable Polymerization Routes for the Preparation of Polyesters, Polycarbonates, and Copolymers, Editors: Cheng, Gross, Smith, Publisher: AMER CHEMICAL SOC, Pages: 135-146, ISBN: 978-0-8412-3065-1
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- Citations: 3
Yi N, Unruangsri J, Shaw J, et al., 2015, Carbon dioxide capture and utilization: using dinuclear catalysts to prepare polycarbonates, FARADAY DISCUSSIONS, Vol: 183, Pages: 67-82, ISSN: 1359-6640
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- Citations: 3
Saini PK, Romain C, Zhu Y, et al., 2014, Di-magnesium and zinc catalysts for the copolymerization of phthalic anhydride and cyclohexene oxide, POLYMER CHEMISTRY, Vol: 5, Pages: 6068-6075, ISSN: 1759-9954
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- Citations: 55
Montrikittiphant T, Tang M, Lee K-Y, et al., 2014, Bacterial Cellulose Nanopaper as Reinforcement for Polylactide Composites: Renewable Thermoplastic NanoPaPreg, MACROMOLECULAR RAPID COMMUNICATIONS, Vol: 35, Pages: 1640-1645, ISSN: 1022-1336
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- Citations: 16
Montrikittiphant T, Tang M, Lee KY, et al., 2014, Macromol. Rapid commun. 19/2014., Macromol Rapid Commun, Vol: 35
Frontispiece: A Werkstoffverbund (laminated composite) manufacturing concept is used to produce high performance renewable bacterial cellulose (BC) nanopaper reinforced thermoplastic laminates. The mechanical performance of the resulting BC-reinforced thermoplastic laminates is found to be dependent on the tensile performance of the reinforcing BC nanopaper. Further details can be found in the article by T. Montrikittiphant, M. Tang, K.-Y. Lee,* C. K. Williams, and A. Bismarck* on page 1640.
Bakewell C, White AJP, Long NJ, et al., 2014, Metal-Size Influence in Iso-Selective Lactide Polymerization, ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, Vol: 53, Pages: 9226-9230, ISSN: 1433-7851
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- Citations: 100
Weiner J, Brown NJ, Shaffer MSP, et al., 2014, Colloidal ZnO/Cu hybrid nanocatalysts for CO2 hydrogenation to methanol, 248th National Meeting of the American-Chemical-Society (ACS), Publisher: AMER CHEMICAL SOC, ISSN: 0065-7727
Williams CK, Bakewell C, Long N, et al., 2014, Stereoblock polylactide: New, highly active, and iso-selective catalysts based on group 3/lanthanide phosphasalen complexes, 248th National Meeting of the American-Chemical-Society (ACS), Publisher: AMER CHEMICAL SOC, ISSN: 0065-7727
Romain C, Williams CK, 2014, Chemoselective polymerization control: From mixed monomer feedstock to copolymers, 248th National Meeting of the American-Chemical-Society (ACS), Publisher: AMER CHEMICAL SOC, ISSN: 0065-7727
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